Sandal sole



FIG. 1 is a bottom plan view of a sandal sole showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a front elevation view thereof;

FIG. 6 is a rear elevation view thereof; and,

FIG. 7 is a bottom, front, right side perspective view thereof.

The broken lines in the drawings showing the top surface details of the sandal sole illustrate environmental structures that form no part of the claim. 

The ornamental design for a sandal sole, as shown and described. 